NDLI: Microporous aluminophosphates synthesized with 1,2,3-trimethylimidazolium and fluoride

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Lee, Jeong Hwan Hong, Suk Bong Camblor, Miguel A. Kim, Eun Jeong López-arbeloa, Fernando
Description	Author Affiliation: Lee JH ( Center for Ordered Nanoporous Materials Synthesis, School of Environmental Science and Engineering, POSTECH, Pohang 790-784, Korea. sbhong@postech.ac.kr.); Kim EJ ( Center for Ordered Nanoporous Materials Synthesis, School of Environmental Science and Engineering, POSTECH, Pohang 790-784, Korea. sbhong@postech.ac.kr.); López-Arbeloa F ( Departamento de Química Física, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080, Bilbao, Spain.); Hong SB ( Center for Ordered Nanoporous Materials Synthesis, School of Environmental Science and Engineering, POSTECH, Pohang 790-784, Korea. sbhong@postech.ac.kr.); Camblor MA ( Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, 28039 Madrid, Spain. macamblor@icmm.csic.es.)
Abstract	The synthesis of microporous aluminophosphates using 1,2,3-trimethylimidazolium (123TMI) and fluoride produces three phases (HPM-3, PST-27 and triclinic $AlPO_{4}-34)$ depending on the amount of water and organic structure-directing agents in the synthesis mixture. Fluoride occluded in double 4-ring units was not detected by $^{19}F$ MAS NMR spectroscopy in any product. While the structure of HPM-3 remains unknown, PST-27 has been determined to be a monoclinic version of $AlPO_{4}-5$ with a distorted and likely complex structure. Rietveld analysis using synchrotron diffraction data for as-made triclinic $AlPO_{4}-34$ reveals that each of its cha-cages holds two 123TMI cations, forming a displaced anti-parallel dimer with a short distance between aromatic rings (3.78 Å from center to center, 3.63 Å from plane to plane). This suggests that π–π interactions may play a role in the synthesis of this phase and related CHA-type systems. A study of the optical properties of PST-27, $AlPO_{4}-34$ and other materials containing 123TMI cations shows their complex fluorescence behavior, sometimes displaying a red-edge effect, i.e., a red shift of the fluorescence as the excitation wavelength is shifted toward the red edge of the absorption band. An absorption band at 291 nm appears only in the dimer-containing triclinic $AlPO_{4}-34$ and is sensitive to the introduction of Si into the framework.
ISSN	14779226
Issue Number	18
Journal	Dalton Trans.
Volume Number	45
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2016-05-04
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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